Image:The mental health response to the tragedy has been called the biggest ever in Europe

"People were going there in order to collect things of sentimental value mostly, occasionally papers that they needed for their everyday life, but very often just small things that they wanted," he said.

"A lot of people said to us that it gave them a sense of closure, to be able to go up there."

Visitors were briefed by police on what they could expect.

"The police were very good at making sure everybody was safe, and actually the residents, when they came down, they said they thought that by and large that had been very helpful for them," said Dr Green.

The fire on 14 June caused around 80 deaths, although authorities say a final figure may not be established for months.